The mine is currently up for sale for $900k.

FILE – This June 7, 2016 file photo, shows flooded caves at Ruggles Mine in Grafton, N.H. The former mica mine attracted tourists for decades before being closed and put on the market in 2016. Initial discussions have been held between state officials and a preservation group about the future of the mine, which has failed to attract a buyer. (AP Photo/Jim Cole, File)